UWOBO interface is based on HTTP GET method: UWOBO can indeed be
contacted with a proper URL containing all parameters needed to request
stylesheet application.

UWOBO supports not only the usual single XSLT stylesheet application to an XML
document, but also application of stylesheets chains. An XSLT
stylesheets chain is a trasformation described providing an ordered list of
XSLT stylesheets. First stylesheet is applied to the input XML document,
output of this trasformation is the input for the application of the second
stylesheet and so on until the last one. Last trasformation output is the
final output sent back to the client.

UWOBO was born at the University of Western Ontario, London, Canada. Later it
has been further refined and developed at the University of Bologna (hence the
name).
Current version of UWOBO has been fully reimplemented from scratch at the
University of Bologna, here you can find a mirror of the
old version web page (beware that some links can be broken).

UWOBO web service is actually bound only to the HTTP GET method. All command
and parameters are encoded in the request URL. The generic format of
UWOBO invocations is:

http://uwobo_url/command[?parameters]

uwobo_url includes hostname on which UWOBO is running and TCP port on
which UWOBO is listening (default is 58080).

A list of available commands (as returned by invoking UWOBO's
/help method) follows:

help
display this help message

add?bind=key,uri[&bind=key,uri[&...]]
load a new stylesheet, specified by uri, and bind it to key
key

remove[?keys=key1,key2,...]
unload stylesheets specified by key1, key2, ... or all
stylesheets if no key was given

reload[?keys=key1,key2,...]
reload stylesheets specified by key1, key2, ... or all
stylesheets if no key was given

list
return a list of loaded stylesheets

apply?xmluri=uri&keys=key1,key2,...[&param.name=value[&param.name=value[&...]]][&param.key.name=value[&param.key.name=value[&...]]][&prop.name[=value][&prop.name[=value][&...]]]
apply a chain of stylesheets, specified by key1, key2, ..., to an
input document, specified by uri.
Additional parameters can be set for each stylesheet application: global
parameters (i.e. parameters passed to all stylesheets) are set using
param.name=value syntax, per stylesheet parameters are set using
param.key.name=value where key is the key of a loaded
stylesheet.
Properties of the final chain output can be set too: valueless properties
can be set using prop.name syntax, others can be set using
prop.name=value syntax.
Current supported properties are: cdata-section-elements, doctype-public,
doctype-system, encoding, indent, media-type, method,
omit-xml-declaration, standalone, version.

We have designed a simple web page (namely the UWOBO panel) which
allows a simple interaction with the processor. Currently, the page is tuned
to be used in the context of HELM, but you can download and customize it to
your needs.Use the panel!.